---
name: Create and publish a Docker image

'on':
  push:
    branches: ['master']

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository }}

jobs:
  build-and-push-image:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write

    steps:
      - name: Checkout repository
        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5  # v5.0.1
        with:
          persist-credentials: false

      - name: Log in to the Container registry
        uses: docker/login-action@5e57cd118135c172c3672efd75eb46360885c0ef  # v3.6.0
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract metadata (tags, labels) for Docker
        id: meta
        uses: docker/metadata-action@318604b99e75e41977312d83839a89be02ca4893  # v5.9.0
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
            # set latest tag for master branch
            type=raw,value=latest,enable=${{ github.ref == 'refs/heads/master' }}

      - name: Build and push Docker image
        uses: docker/build-push-action@263435318d21b8e681c14492fe198d362a7d2c83  # v6.18.0
        with:
          context: .
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}